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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-09-30 01:49:39 -0400
committerIngo Molnar <mingo@elte.hu>2008-10-14 10:38:21 +0200
commitca2db6cf30d6a45798b7a760d0c4f7735b16799d (patch)
tree5c1658ec172fdaa04ee018972eb96f0f2c409676 /kernel/tracepoint.c
parentd74185ed27651ad8d920b37d7851306ad01f7d6f (diff)
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tracepoints: use rcu sched
Make tracepoints use rcu sched. (cleanup) Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/tracepoint.c')
-rw-r--r--kernel/tracepoint.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index c7c62a4a75f5..db39961a0d03 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -80,10 +80,7 @@ static void tracepoint_entry_free_old(struct tracepoint_entry *entry, void *old)
entry->rcu_pending = 1;
/* write rcu_pending before calling the RCU callback */
smp_wmb();
-#ifdef CONFIG_PREEMPT_RCU
- synchronize_sched(); /* Until we have the call_rcu_sched() */
-#endif
- call_rcu(&entry->rcu, free_old_closure);
+ call_rcu_sched(&entry->rcu, free_old_closure);
}
static void debug_print_probes(struct tracepoint_entry *entry)
@@ -245,9 +242,9 @@ static int remove_tracepoint(const char *name)
if (e->refcount)
return -EBUSY;
hlist_del(&e->hlist);
- /* Make sure the call_rcu has been executed */
+ /* Make sure the call_rcu_sched has been executed */
if (e->rcu_pending)
- rcu_barrier();
+ rcu_barrier_sched();
kfree(e);
return 0;
}
@@ -344,11 +341,11 @@ int tracepoint_probe_register(const char *name, void *probe)
}
}
/*
- * If we detect that a call_rcu is pending for this tracepoint,
+ * If we detect that a call_rcu_sched is pending for this tracepoint,
* make sure it's executed now.
*/
if (entry->rcu_pending)
- rcu_barrier();
+ rcu_barrier_sched();
old = tracepoint_entry_add_probe(entry, probe);
if (IS_ERR(old)) {
ret = PTR_ERR(old);
@@ -387,7 +384,7 @@ int tracepoint_probe_unregister(const char *name, void *probe)
if (!entry)
goto end;
if (entry->rcu_pending)
- rcu_barrier();
+ rcu_barrier_sched();
old = tracepoint_entry_remove_probe(entry, probe);
mutex_unlock(&tracepoints_mutex);
tracepoint_update_probes(); /* may update entry */